Using Heron's formula find the area of the triangle where the sides are a=50 cm, b=52 cm and c=70 cm
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S=50+52+70/2
=172/2=86
A=root s(s-a)(s-b)(s-c)
=root 86(86-50)(86-52)(86-70)
=root 86×36×34×16
=6×4root 86×34
=24root 43×2×17×2
24×2root 43×17
48root 43 ×17
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